Plotly

Updated

- Updated Plotly.js to from version 2.4.1 to version 2.4.2. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#240----2021-08-27) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
- Bug fix for rendering unified hover labels in classic Jupyter Notebooks

Updated

- Updated Plotly.js to from version 2.3.1 to version 2.4.1. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#240----2021-08-27) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
- Added `legend.groupclick` options
- Provide bbox of hover items in event data

Fixed
- Fixed error when using the orjson engine with non-string keys [3351](https://github.com/plotly/plotly.py/pull/3351)

Updated

- Updated Plotly.js to from version 2.2.0 to version 2.3.1. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#231----2021-07-30) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
- new projections in `geo` subplots from a more recent version of `d3-geo`
- new number-formatting directives from a more recent version of `d3-format`
- Improve rendering of `scattergl`, `splom` and `parcoords` by implementing `plotGlPixelRatio` for those traces
- performance improvements and bug fixes

Added
- Extra flags were added to the `gapminder` and `stocks` dataset to facilitate testing, documentation and demos [3305](https://github.com/plotly/plotly.py/issues/3305)
- All line-like Plotly Express functions now accept `markers` argument to display markers, and all but `line_mapbox` accept `symbol` to map a field to the symbol attribute, similar to scatter-like functions [3326](https://github.com/plotly/plotly.py/issues/3326)
- `px.scatter` and `px.density_contours` now support new `trendline` types `'rolling'`, `'expanding'` and `'ewm'` [2997](https://github.com/plotly/plotly.py/pull/2997)
- `px.scatter` and `px.density_contours` now support new `trendline_options` argument to parameterize trendlines, with support for constant control and log-scaling in `'ols'` and specification of the fraction used for `'lowess'`, as well as pass-through to Pandas for `'rolling'`, `'expanding'` and `'ewm'` [2997](https://github.com/plotly/plotly.py/pull/2997)
- `px.scatter` and `px.density_contours` now support new `trendline_scope` argument that accepts the value `'overall'` to request a single trendline for all traces, including across facets and animation frames [2997](https://github.com/plotly/plotly.py/pull/2997)
- A new `px.ecdf()` function for Empirical Cumulative Distribution Functions [3330](https://github.com/plotly/plotly.py/pull/3330)

Fixed
- Fixed regression introduced in version 5.0.0 where pandas/numpy arrays with `dtype` of Object were being converted to `list` values when added to a Figure ([3292](https://github.com/plotly/plotly.py/issues/3292), [#3293](https://github.com/plotly/plotly.py/pull/3293))
- Better detection of Chrome and Chromium browsers in the Renderers framework, especially on Linux ([3278](https://github.com/plotly/plotly.py/pull/3278)) with thanks to [c-chaitanya](https://github.com/c-chaitanya) for the contribution

- Updated Plotly.js to from version 2.1.0 to version 2.2.0. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#220----2021-06-28) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
- new `<trace>.legendgrouptitle` attribute for legend group titles
- new `%h` text formatting directive for half-years
- performance improvements and bug fixes

Updated/Changed

Items in this section may be considered backwards-incompatible changes for the purposes of [Semantic Versioning](http://semver.org/) but we expect the vast majority of users to be able to upgrade to version 5.0 without encountering any issues.

- **Dropped support for Python older than 3.6** [3160](https://github.com/plotly/plotly.py/pull/3160)
- Updated Plotly.js to from version 1.58.4 to version 2.1.0. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#210----2021-06-18) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
- dropped support for IE9 and IE10
- dropped support for long-deprecated `graph_objects` like `area` traces and `scatter.(t|r)` and `layout.(radial|angular)axis` attributes
- modebar no longer has hovermode or spikeline buttons by default (can be added back with `fig.update_layout(modebar_add=["v1hovermode", "toggleSpikeLines"])`)
- "Aa" text no longer appears on legend items unless `mode="text"`
- In `bar` traces, `textposition` now defaults to `"auto"`
- Font size for legend and colorbar titles now matches axis title font size (slightly bigger)
- deprecated `heatmapgl`, `pointcloud` traces as well as all `transform` attributes
- Combined `plotlywidget` into `jupyterlab-plotly` and packaged them as a federated extension [3142](https://github.com/plotly/plotly.py/pull/3142) with massive thanks to [fcollonval](https://github.com/fcollonval) for the contribution
- In addition to this change, large Plotly.js bundles are now lazily loaded on-demand by JupyterLab
- Plotly.js CDN url will now be versioned by default for HTML exports using `include_plotlyjs='cdn'` and for "connected" renderers. [2961](https://github.com/plotly/plotly.py/pull/2961) with thanks to [adehad](https://github.com/adehad) for the contribution
- Recommending Kaleido by default over Orca [3094](https://github.com/plotly/plotly.py/pull/3094)
- Replaced `retrying` dependency with `tenacity` [2911](https://github.com/plotly/plotly.py/pull/2911) with thanks to [jmsmdy](https://github.com/jmsmdy) for the contribution
- Plotly Express now always takes into account every value in `category_orders` when computing discrete mappings (color, symbol, line-dash, pattern-shapes) as well as facets, even those values which are absent in the data [3247](https://github.com/plotly/plotly.py/pull/3247)

Added

- Additions due to bumping Plotly.js from 1.58.4 to 2.1.0 (see [changelog]((https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#210----2021-06-18))):
- New `icicle` trace type, with thanks to [Kully](https://github.com/Kully) and [mtwichan](https://github.com/mtwichan) of [Zyphr](https://www.zyphr.ca/) for their contribution!
- New `marker.pattern` options for `bar`-like trace types with thanks to [s417-lama](https://github.com/s417-lama) for the contribution!
- New `legendrank` attribute to control rank of traces within legends
- Plotly Express' `px.bar()`, `px.histogram()` and `px.bar_polar()` now support the `pattern_shape` argument [3252](https://github.com/plotly/plotly.py/pull/3252)
- New Plotly Express `px.icicle()` function, with thanks to [Kully](https://github.com/Kully) and [mtwichan](https://github.com/mtwichan) of [Zyphr](https://www.zyphr.ca/) for their contribution! [#3256](https://github.com/plotly/plotly.py/pull/3256)
- New functions in `plotly.colors`: `get_colorscale()` and `sample_colorscale()` [3136](https://github.com/plotly/plotly.py/pull/3136) and [#3186](https://github.com/plotly/plotly.py/pull/3186) with thanks to [CarlAndersson](https://github.com/CarlAndersson) for the contributions
- Faster JSON encoding when `orjson` is present [2955](https://github.com/plotly/plotly.py/pull/2955)

Fixed

- Pandas and Numpy datetime serialization fixes [3022](https://github.com/plotly/plotly.py/pull/3022)
- Fixed selected points of histograms in FigureWidget [2771](https://github.com/plotly/plotly.py/pull/2771) with thanks to [meffmadd](https://github.com/meffmadd) for the contribution
- Static image export now honors `layout.(width|height)`[3240](https://github.com/plotly/plotly.py/pull/3240)
- Improvements to "matplotlylib" conversion utility in `plotly.tools.mpl_to_plotly()` with thanks to [fdion](https://github.com/fdion) [#3143](https://github.com/plotly/plotly.py/pull/3143)